Son, you can fight or surf, an' Charlie don't surf! (Apocalypse Now)
When did you first use the internet? This excludes college/school/company intranet e-mail or messaging...
I reckon we will see some interesting responses from people who work in the IT industry on this one, but other than that I would be surprised to see anyone using the internet before 1995...
When I was a fresher at Uni in 1994 I found myself in a shared house of strangers, one of who was an Amiga superuser on a Media Lab Arts course (Dave Garrity, where are you now?) Anyway, this housemate showed me how to reach BBS on his Amiga.
Other than that, it was July 1997 for me, when I got my first job a week after leaving Uni... I used the 'net in business capacity and a month later (after finding Yahoo, Car sites and 'other resources'
) I bought a P133 with a superfast 56k modem.